12279227138742 has 16 divisors (see below), whose sum is σ = 24586457086512. Its totient is φ = 4088408578080.

The previous prime is 12279227138723. The next prime is 12279227138777. The reversal of 12279227138742 is 24783172297221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166778009 + ... + 1166788532.

It is an arithmetic number, because the mean of its divisors is an integer number (1536653567907).

Almost surely, 2^{12279227138742} is an apocalyptic number.

12279227138742 is an abundant number, since it is smaller than the sum of its proper divisors (12307229947770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12279227138742 is a wasteful number, since it uses less digits than its factorization.

12279227138742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333567423.

The product of its digits is 9483264, while the sum is 57.

The spelling of 12279227138742 in words is "twelve trillion, two hundred seventy-nine billion, two hundred twenty-seven million, one hundred thirty-eight thousand, seven hundred forty-two".